David Faiman is a scientist who studies the sun and how we can use the sun's energy to create electricity. Just like we need food to give us energy, the sun gives us energy in the form of sunlight. But getting that energy and turning it into something we can use is very tricky!
David Faiman figured out ways to make solar panels that are more efficient at capturing sunlight and turning it into electricity. He also helped invent new ways to store that electricity so we can use it when the sun isn't shining.
So, imagine the sun is a giant lightbulb that never runs out of energy. David Faiman is like a genius who figured out how to make our own little lightbulbs that can run on the sun's energy, so we don't have to rely on fossil fuels or other dirty sources of energy.